I need advice quick!

Yesterday when my H was at the house with Ds - I left right away, told him I was going hiking. He was shocked that I was not staying - he asked if I was going with someone. I pretended like I didn't hear him and left. Today he sent me a text asking if I had a date when I went hiking! I haven't text him back yet. How should I handle this? I will not play games, but if I don't ask him questions about his OW then should I tell him it isn't his business? or is it best just to say no one after I have let him wait for my response?


TAMF
m:41
xh:41
T: 20
M: 15
D: 16
D: 14
Bomb dropped: 7/3/10
separated: 7/15/10
H moved in to new apt. with OW: 7/1/11
divorced: 8/26/12